Synlogic Ownership | Who Owns Synlogic?

Synlogic Ownership Summary

Synlogic is owned by 0.19% institutional investors, 22.60% insiders, and 77.20% retail investors. Vanguard group is the largest institutional shareholder, holding 1.63% of SYBX shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.19% of its assets in Synlogic shares.

SYBX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Synlogic	0.19%	22.60%	77.20%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Biotech Stocks	35.80%	11.85%	52.35%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	201.06K	1.63%	$225.19K
Drw securities	23.76K	0.19%	$14.49K
Hilltop national bank	20.00	0.00%	$12.00
Jones financial companies lllp	20.00	0.00%	$35.00
Susquehanna group, llp	-	-	-
Jane street group	-	-	-
Renaissance	-	-	-
Fiduciary trust	-	-	-
Barclays	-	-	-
State street	-	-	-

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Drw securities	23.76K	0.00%	$14.49K
Renaissance	-	-	-
Northern trust	-	-	-
Barclays	-	-	-
Susquehanna group, llp	-	-	-
Jane street group	-	-	-
Abg innovation capital partners iii gp	-	-	-
State street	-	-	-
Fiduciary trust	-	-	-
Geode capital management	-	-	-

Top Buyers

Holder	Shares	% Assets	Change
Vanguard group	201.06K	-	4.60K
Jones financial companies lllp	20.00	-	20.00
Hilltop national bank	20.00	-	-
Jpmorgan chase	-	-	-1.00
Barclays	-	-	-1.00

Top Sellers

Holder	Shares	% Assets	Change
Cable car capital	-	-	-3.31M
Nea management company	-	-	-2.92M
Citadel advisors	-	-	-141.61K
Renaissance	-	-	-85.63K
Geode capital management	-	-	-71.64K

New Positions

Holder	Shares	% Assets	Change	Value
Jones financial companies lllp	20.00	-	20.00	$35.00

Sold Out

Holder	Change
Danske bank	-1.00
Jpmorgan chase	-1.00
Barclays	-1.00
Citigroup	-1.00
Wells fargo & company/mn	-5.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	2	-92.00%	23,783	-99.65%	-	0.01%	-	-100.00%	1	-
Dec 31, 2025	16	-30.43%	432,435	-93.50%	3	0.12%	7	-30.00%	-	-100.00%
Sep 30, 2025	23	27.78%	6,655,293	-1.72%	54	1.78%	11	57.14%	4	33.33%
Jun 30, 2025	18	12.50%	6,771,874	95.25%	55	6.92%	7	75.00%	3	-
Mar 31, 2025	17	-	6,780,518	0.24%	55	1.79%	4	33.33%	3	50.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	139.45K	1.19%	-
Vanguard Total Stock Mkt Idx Inv	136.47K	1.17%	-2.98K
Fidelity VIP Growth Initial	76.83K	0.66%	-
Fidelity Capital Appreciation	61.29K	0.52%	-
Fidelity Advisor Equity Growth I	43.12K	0.37%	-
Fidelity Extended Market Index	40.42K	0.35%	3.98K
Vanguard Institutional Extnd Mkt Idx Tr	32.28K	0.28%	-10.20K
Fidelity Growth Discovery	29.26K	0.25%	-
NT Ext Equity Mkt Idx Fd - NL	16.59K	0.14%	-
NT Ext Equity Mkt Idx Fd - DC - NL - T2	13.07K	0.11%	98.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Oct 29, 2025	Dooley Mary Beth	See Remarks below	Sell	$284.17
Apr 02, 2025	Dooley Mary Beth	See Remarks below	Sell	$172.80
Feb 03, 2025	Dooley Mary Beth	See Remarks below	Sell	$2.80K
Oct 29, 2024	Dooley Mary Beth	Head of Finance	Sell	$110.60
Apr 02, 2024	Dooley Mary Beth	Head of Finance	Sell	$325.24

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	1
2025 Q2	-	1
2025 Q1	-	1
2024 Q4	-	1
2024 Q2	-	2

SYBX Ownership FAQ

Who Owns Synlogic?

Synlogic shareholders are primarily institutional investors at 0.19%, followed by 22.60% insiders and 77.21% retail investors. The average institutional ownership in Synlogic's industry, Biotech Stocks , is 35.80%, which Synlogic falls below.

Who owns the most shares of Synlogic?

Synlogic’s largest shareholders are Vanguard group (201.06K shares, 1.63%), Drw securities (23.76K shares, 0.19%), and Hilltop national bank (20 shares, 0.00%). Together, they hold 1.83% of Synlogic’s total shares outstanding.

Does Blackrock own Synlogic?

BlackRock is not among the top 10 institutional shareholders of Synlogic.

Who is Synlogic’s biggest shareholder by percentage of total assets invested?

Drw securities is Synlogic’s biggest shareholder by percentage of total assets invested, with 0.00% of its assets in 23.76K Synlogic shares, valued at 14.5K$.

Who is the top mutual fund holder of Synlogic shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Synlogic shares, with 1.19% of its total shares outstanding invested in 139.45K Synlogic shares.

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